About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Multi-Principal Element Alloys II
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Presentation Title |
Low-cycle-fatigue Effects on Lattice Distortion of CoCrFeMnNi High-entropy-alloy |
Author(s) |
Mao-Yuan Luo, Jo-Chi Tseng , Tu-Ngoc Lam, E-Wen Huang |
On-Site Speaker (Planned) |
Mao-Yuan Luo |
Abstract Scope |
The lattice distortion effect is a specific phenomenon for high entropy alloys. It is still unclear how the lattice distortion changes during the low cycle fatigue process. Hence, in this study, we plan to apply the unique feature of the high-energy synchrotron X-ray to analyze the CoCrFeMnNi high entropy alloys (HEAs) using total scattering measurement with pair-distribution function (PDF) and Extended X-ray absorption fine structure (EXAFS) of X-ray absorption spectroscopy. We have carried out preliminary Laue diffraction and X-ray fluorescence (XRF) using NSRRC TPS21A beamtime. The deviatoric strain of different fatigue stages is presented in mapping formats. By comparing the lattice distortion results from different methods, we can comprehensively profile the evolution of lattice distortion during the low cycle fatigue process and determine whether the strengthening effect from lattice distortion is a pro or con for the fatigue properties. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Mechanical Properties, Characterization |